| 摘要 |
<p>A system (101) for heating supply air, with simultaneous defrosting of a water-exhaust air heat exchanger, when controlling the indoor climate in a building, at least comprising a first air duct (102) for supply air, a second air duct (105) for exhaust air, an exhaust-supply air heat exchanger (108) for selective heat transfer between supply air and exhaust air, a water system (109) having a hot water circuit (110) and a cold water circuit (111), a water-supply air heat exchanger (112) at the first air duct (102) and the water-exhaust air heat exchanger (113) at the second air duct (105), both for selective connection to the hot water circuit (110) or the cold water circuit (111), a heat pump (114) for selective heat transfer between the water circuits (110, 111), wherein the exhaust-supply air heat exchanger is a rotary heat exchanger (108)positioned upstream of the water-exhaust air heat exchanger (113) and having an efficiency correlating to rotational speed and rotational speed control means for enabling efficient defrosting of the water-exhaust air heat exchanger (113) by reduction of the rotational speed (RRED) in order to obtain an elevated temperature of the exhaust air (A6) passing through the water-exhaust air heat exchanger (113) in combination with the hot water circuit (110) simultaneously being connected to the water-exhaust air heat exchanger (113).</p> |
